211212110012201 has 4 divisors (see below), whose sum is σ = 211212910282692. Its totient is φ = 211211309741712.

The previous prime is 211212110012147. The next prime is 211212110012209. The reversal of 211212110012201 is 102210011212112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92739769762201 + 118472340250000 = 9630149^2 + 10884500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211212110012201 is a prime.

It is a super-2 number, since 2×211212110012201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211212110012201.

It is not an unprimeable number, because it can be changed into a prime (211212110012209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399739226 + ... + 400267251.

It is an arithmetic number, because the mean of its divisors is an integer number (52803227570673).

Almost surely, 2^{211212110012201} is an apocalyptic number.

It is an amenable number.

211212110012201 is a deficient number, since it is larger than the sum of its proper divisors (800270491).

211212110012201 is an equidigital number, since it uses as much as digits as its factorization.

211212110012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800270490.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211212110012201 its reverse (102210011212112), we get a palindrome (313422121224313).

The spelling of 211212110012201 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred ten million, twelve thousand, two hundred one".